Automatic valve.



UNITED' sTATiEs PATENT OEEIOE.

CLAYTON AUBEA DUNHAM, vor MAiasnALLToWN, IOWA.

Au'rowlA-rlc'vALvE.

Specification of Letters Patent.

Patented Jan. 2e, 1907.

Application led January 4, 1906- Serial No. 294,544.

To all whom it wagten/067%:

Beit known that I, CLAYTON AUBRA Dune Hanna citizen of the United States, and a resident, of Marshalltown, in the county of 5 Marshall and State of Iowa, have invented a,`

new and Improved Automatic Valve, of

' which the following is a full, clear, and exact V -The invention resides in certain` special' features of construction and relative arrangement of parts', which will be fully set forth hereinafter and particularly pointed out inA the claims.

Reference is to be had to the accompan ing drawings, which illustrate, as an examp e,

` the re'ferred embodiment of my invention,

in w ich drawings- Figure 1 is .an enlarged side view of the valve, and Fig. 2 is an enlarged section of the same.

\ casing of double convex form and composed of an upper section 10 and a lower section 11, screwed together, as shown. Projecting` from the lower section 11 is an inletnipple 12. As here shown, this nipple 1s connected with a thimble 14, which in turn communi` cates with `the`return of the radiator, which is indicated by the broken lines 15 in Fig. 1. o From the center of the lower section 1 1 an outlet-nipple 16 passes, and at the upper end thereof is arranged a flat valve-seat 17, surrounding the dischargeeorifice 1S.

19 indicates the valve proper, which has a iiat face arranged to bear on the seat 17, thus sealing the orifice 18 and preventing vfluid `movement through they valve. The valve, roper, 19, has a flange 20, which is fastened y soldering or otherwise to a circular able material. The valve 19 has its inner end extendingr through an opening in said late 21 and formed with a tapering plug 22.

opening-27 extending throughit to meet the I cavity of the block, and this opening is nor- The valve, ashere shown, has a circular corrugated plate 21, of copper or other suit` the plate 21. The block 23A has a flange 26, which is soldered to the plate, thus securing the block in place. Said block 23 has an mally plugged by a pin 24, which is screwed therein, as shown. This pin serves not only to seal the opening 27, but is screwed in the upper section 10 of the case of the valve, so as to sustain the valve proper with itsoperating parts. The two plates 21 and 25are opposite each other, and their edges are liermetically connected together, so that the Yplates form a circular chamber, and owing to 7o` I the ilexibility of the plates this chamber may be expanded or contracted to move'the valve 19 toward and from thev seat 17. The chamber thus formed is adapted to be partly filled with a highly-volatile liquid, so that as the 7 5 chamber is heated the liquidwill vaporize and expand, expanding the walls of the chamber and seating the valve.

In the construction of the device theplates 21 and 25 are joined together and the parts 8o 19 and 23secured place, said parts engagp ing each other to limit the inward movement of the plates. The liquid which is placed in the expanded chamber is then introduced through the orifice 27, and finally the pin 24 is. inserted and secured, if desired, by solder, soas' to form an entirely Ihermetic connection. This pin is .then screwed into the top section 10 of the case, and by adjusting the position of the pin the distance of the movement of the valve 19 to its seat may be regulated.

In the use of the invention the valve 'is arranged to be normally open, and, assuming that it is used in connection with vacuum heating systems, as the vacuum-pump begins to operate air and water will be drawn out of the radiator and will pass freely through the opening 18. A s steam begins to enter the radiators, however, and reaches'. the valvecasing it will raise the temperaturel therein, vaporizing theliquid in the expanf sion-chamber and causing the valve 19 to be,- engaged firmly with its seat, thus closin theY opening 18 and preventing the escape o the\ 1o 5 steam. The valve is useful in various other connections, as 'will ,'it` is thought, be apparent.

- By providing the stud 22 and cavity in 23, which match as explained, I insure properly positioning the two disks 21 and 25 during 1ro the time that they are .being clenched or otherwise fastened together at their edges.

' VHaving thus described the preferred form 'of my invention, whatv I claim as new, and

desire 'to secure by Letters Patent, is a i 1.v Avalve comprising1 a casing with inlet and o utletopenin s and a seat, a valve proper coacting Wit the seat, an expansionchamber .to one wall of which the valve proper is connected, a member connected to vacl:

theopposite wallzof the expansion-chamber, saidmember and valve being-extended into the expansion-chamber to engage each other and -li-mit the movement of the wallsv of the .chamber toward each other, and means for 3. vA valve comprisinga casing with inletand outlet oriiices'and a valve-seat, a valve proper coacting therewith, an expansionchamberto which the valve proper is attached, a member permanently secured in the walll of the expansion-chamber opposite the valve proper and having a lining-opening therein, and aplug secured in said opening and adjustably connectedt'o the inner side of the casing, for the double purpose specified,

4; A valve comprising a casing with inlet andv outlet oriiices and a valve-seat, a valve proper coacting therewith, an expansicnchamber to lwhich the valve proper isattached, a member secured in the wall of the expansion-chamber opposite the valve proper v and having a filling-opening therein, and a plug secured in said opening and adjustably i connected to the casing, for the double purpose specified, the inner end of the valve and the said member being adapted to engage each other Withinthe' expansion-chamber to limit the contraction of said chamber.

5. A valve having a casing with inlet and outlet openings and a valve-seat, a valve proper coacting with the seat, an expansionchamber to which the valve proper is. at-

tached, a member secured to the Wall of the expansion-chamber opposite the valve properand having a {illin -opening therein, and a plug secured in sai opening-for the purpose specified. A

6. A valve having a casing with inlet and outlet-f openings and a valve-seat, a valve proper` coacting with the seat, an expansion- .chamber to which the valve proper is attached, a member secured to they wall of the .expansion-chamber opposite the valve proper and having a fillin -opening therein, and a plug secured in sai opening, Jfor the purpose specified, the valve and said member having portions extended into the eX^ pansion-chamber and adapted to engage each other to limit the contracting movement of the chamber.'

47.- ln .a`valve,' the combination of a casing having inlet and outlet openings and a valveseat, va valve coactingfwith the seat and centrolling fluid movement 'through the casing.

an expansion-chamber located within the casing and to one side of which the valve is chamber and projecting'rfrom the side to which the valve is attached, an Orificed attached, a plug` Within the expansionblock fastened to the other side of the eX- parisien-chamber and co acting with the said plug, and a member screwed inl the oriii'ce in the block and connected with the' casing to attach the expansion-chamber to the same. In testimony whereof I have signed-my name to this specification in the presence of two subscribing witnesses. CLAYTON AUBRA DUNHAM. Witnesses E. T. FLANAGAN,

SAM ORONEROD. 

